Public Water Systems
10,988 active public water systems in WI, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
| Segway the Door Tours & Backroads Deli | Green Bay, WI | 63 | 30 | - |
| Walkers Silvermoon | Alma, WI | 63 | 17 | - |
| St Pauls Liberty Luth Church | Deerfield, WI | 62 | 0 | - |
| Boundaries Bar & Grill | Beloit, WI | 62 | 9 | - |
| Baraboo RV Resort | Goldendale, WI | 62 | 0 | - |
| Healthwise Chiropractic | Hales Corners, WI | 62 | 12 | - |
| Elm Grove Park & Shop Card Shop & Zisters | Elm Grove, WI | 62 | 2 | - |
| Elm Grove Park & Shop - Post Office | Elm Grove, WI | 62 | 2 | - |
| Douglas Plaza South | Waukesha, WI | 62 | 138 | - |
| Bergmann & Holm Dental Group | Okauchee, WI | 62 | 6 | - |
| Seaquist Orchards Farm Market LLC | Ellison Bay, WI | 62 | 29 | - |
| B & B Metals Office | Newton, WI | 62 | 0 | - |
| Random Lake Citgo | Mequon, WI | 62 | 0 | - |
| Aurora Sheboygan Clinic - Howards Grove | Sheboygan, WI | 62 | 10 | - |
| Armstrong Creek Pub | Armstrong Creek, WI | 62 | 31 | - |
| Apostolic Worship Center | Bryant, WI | 62 | 423 | - |
| Mas Place | Gleason, WI | 62 | 12 | - |
| Rubert Chiropractic | Fall River, WI | 61 | 0 | - |
| St Pauls Evang Lutheran Church | Lomira, WI | 61 | 12 | - |
| Umos Beaver Dam Migrant Head Start Center | Oshkosh, WI | 61 | 13 | - |
| Spuncast Inc - Well 1 | Watertown, WI | 61 | 58 | - |
| St Pauls Evangelical Lutheran Church | Neosho, WI | 61 | 4 | - |
| Mbe Cpas | Baraboo, WI | 61 | 34 | - |
| Bodis Bake Shop | Lake Geneva, WI | 61 | 1 | - |
| Highview Ev Presbyterian Church | Dousman, WI | 61 | 0 | - |
| Rogers Mem Hosp - Kubly | Oconomowoc, WI | 61 | 1 | - |
| Rogers Mem Hosp - Cedar Ridge Main | Oconomowoc, WI | 61 | 0 | - |
| Karls Transport | Antigo, WI | 61 | 0 | - |
| Schoepps Cottonwood Resort | Hayward, WI | 60 | 18 | - |
| Pine Vista MHP 1 | Las Vegas, WI | 60 | 4 | - |
| Quality Inn & Suites | Lodi, WI | 60 | 4 | - |
| Luckys Lodge | Lodi, WI | 60 | 0 | - |
| WI DNR Kegonsa Dump Station Shop | Stoughton, WI | 60 | 11 | - |
| West Towne Office Center | Madison, WI | 60 | 379 | - |
| Lake Pointe Apts - Well 1 5320-5326 | Mt Horeb, WI | 60 | 31 | - |
| Lake Pointe Apts - Well 2 5312-5318 | Mt Horeb, WI | 60 | 106 | - |
| Symdon Motors Inc | Mount Horeb, WI | 60 | 0 | - |
| Statz Brothers Inc | Marshall, WI | 60 | 0 | - |
| Pineview Veterinary Hospital & Pet Resort | Southfield, WI | 60 | 0 | - |
| Grande Cheese Co Rubicon | Rubicon, WI | 60 | 0 | - |
| Columbus Chemical Industries Inc | Columbus, WI | 60 | 63 | - |
| Stolls Olde 109 | Watertown, WI | 60 | 25 | - |
| Itw Shakeproof Group - North System | Watertown, WI | 60 | 6 | - |
| Ballweg Implement | Waupun, WI | 60 | 30 | - |
| Beetown Assembly | Lancaster, WI | 60 | 0 | - |
| Dodge Point Country Club | Mineral Point, WI | 60 | 4 | - |
| House on the Rock Inspiration Point | Spring Green, WI | 60 | 0 | - |
| Traders Island Campground | Arena, WI | 60 | 85 | - |
| Edwin Frohmader VFW Post 1879 | Fort Atkinson, WI | 60 | 0 | - |
| Rock River Co Park | Jefferson, WI | 60 | 0 | - |